Synonyms of precaution

1. precaution, safeguard, guard, measure, step: usage: a precautionary measure warding off impending danger or damage or injury etc.; "he put an ice pack on the injury as a precaution"; "an insurance policy is a good safeguard"; "we let our guard down"
2. precaution, circumspection, caution: usage: the trait of practicing caution in advance
3. caution, precaution, care, forethought, judiciousness: usage: judiciousness in avoiding harm or danger; "he exercised caution in opening the door"; "he handled the vase with care"